Steam-generator



3 Shee tS -Sheet 1., M. "N. LO VELL. Steam-Generator.

J .nted Mar. 16,1880.

PETERS, PHDTO-LITHOGRAFHER. WASHINGTON. D. c.

3 Sheets-Sheet 3. M. N. LOVELL.

Steam-Generator] No. 225,480. Patented Mar. 16, 18801" WITNESSES Irv/ N E A m i E %.A YWMQ UNITED STATES PATENT OFFICE.

MELVIN N. LOVELL, OF ERIE, PENNSYLVANIA.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 225,480, dated March 16, 1880.

Application filed January 12, 1880.

T 0 all whom tt may concern Be it known that L MELVIN N. LOVELL, of Erie, in the county of Erie and State of Pennsylvania, have invented a new and useful Steam-Generator and I do hereby declare the following to be a full, clear, and exact de scription thereof.

My invention relates to improvements in steam-generating apparatus for heating and other purposes and it consists in an improved construction and arrangement of parts for the object named, as will fully and at large appear in the following general description.

My device is illustrated in the drawings hereto attached and forming apart of this specification, as follows:

Figure 1 is an elevation. Fig. 2 is a vertical section on the line x at in Fig. 1. Fig. 3 is a top view, beginning on the line as :v in Fig. 2. It is then on the right broken down to the line y 3 Fig. 2, and still farther to the right it is broken down to the line 2 2, Fig. 2.

So far as the manner of feeding and consuming the fuel is concerned, my device operates on the same plan as a base-burnin g magazine hard coal stove or furnace, having a grate and fire-box, S, a magazine, L, and a feeding-hopper, Gr. The boiler or steam-generator proper consists of a series of tubular castings of peculiar form, arranged so as to form the fire-box, and to intercept the heat and flame from the fire in its passages through the flues, as will more fully appear hereinafter.

A represents the base-plate of the apparatus. B is a lower outer jacket. B is a jacket which formsthe ash-pit, free access to which is had through the door G. On the outer jacket, B, sets a flanged perforated rim, D, which is provided with annular flanges e c e and with perforations d d d, &c. Against the flanges e c 6, respectively, set sheet-iron jackets E E E, respectively, thus forming separate chambers or flues, access to which is had through the respective perforations cl d d. On the top of these annular jackets sets a second ann ularly-flanged rim, F. The flanges on this rim are marked 0 e c, as on the rim D. This rim is, however, provided with only one series of perforations, (marked d.) Farther within the furnace is arranged an annular partition, M, Fig. 3, which, together with the jackets or partitions E E, forms the fireflues of the furnace, the direction of draft being, as indicated by arrows, as follows: from the fire-box over the partition M, thence through the perforations d into the space between the jackets B B, thence through the perforations (2 into the space between the jackets E E, thence through perforations d in the upper rim, F,into a dome-chamber formed by an upper jacket, H, and the top plate or casting, I, and thence out through the chimney J.

The parts which form the boiler are as follows: two large horseshoe shaped hollow castings, O 0; two large circular hollow castings, P P; two series of small hollow circular castings, QQ, which are alike in everything but the diameter of their circle, being of equal caliber. The hollows of the parts 0 O and P P are elliptical, while those of the parts Q Q are round. Each of these parts is provided with a certain number of side openings, T, through bosses raised on the sides of the casting. The number of these openings used is three; but it may be more or less, as desired. Each boss through which the openings are made is properly faced off, so that as one part is laid upon another the faces of the bosses will form a joint, which may be packed in proper manner.

The horseshoe-castings and the large casting P P are provided with double bosses and openings, so as to be in line with the openings in the two series of small castings Q Q. By this means the whole system of castings O O, P P, and Q Q can be piled together, as shown in Fig. 2, and secured by bolts R R, which pass through the openings T, as seen in that figure. When thus arranged the castings form a complete Water-boiler in the form of a pipe-coil, and with free communication from the hollow of one casting to the hollow of another through the openings T, thereby giving perfect watercirculation. From Fig. 2 the arrangement of these parts will be seen to be as follows: The

, parts 0 and P are placed at the bottom and form the fire-box, in the bottom of which is placed the grate S. Above these are arranged the two series of small rings Q Q. These are surmounted by the large ring P, and above it is placed the horseshoe-casting O.

The horseshoe-castings O O 118;"6 openings through the pipes (seen in Fig. 1,) whence at the ends of their projections, and also one at the bend, which openings are properly capped over. The object in this construction is as follows: First, to afford an opening for the admission of fuel between the two projections of the casting O, as by the hopper G, and for access to the ash-pit between the two "projections of the casting O, as by the door 0; second, when the caps are removed from the orifices they close, free access can be had to the interior for removing sediment or incrustation, the passage from the opening in either of the projections to the opening in the bend being so nearly straight that no trouble will be experienced in working a scraper. (See left side of Fig. 3.)

The supply-pipe for the admission of water may be tapped into either of the caps on the casting O, and the service-pipe can likewise be tapped into either of the caps on the casting 0, which is the steam-space, and the steamgage and safety-valve may also connect with or through either of the other caps on the casting 0.

The parts 0 P and O P are provided with tongue and groove on their adjoining faces, so as to form a tight joint; but the series of small rings are placed wide enough apart to permit a free passage of the flame from the burning fuel.

The partition M, before spoken of, is adjusted between the two series of small pipes Q Q, and compels the flames to pass first through the series Q, and then through the series Q, the course of the flame being up inside of the partition M, (which is high enough to cause them to impinge against the ring P,) and then down on the outside of said partition.

This arrangement is intended for use when hard coal or coke is used as fuel. If, however, it should be desired to use soft coal, I presume it will be necessary to dispense with the partition M and the jacket E, and let the flames pass direct from the fire-box to the opening 61 in the ring F.

The space between the jackets E and E is only intended for air, which enters from below through the openings (1 and passes out it may be conducted to registers in the floors above,and thus economize the heat which would otherwise radiate away from the jacket E.

1 am aware that a steam-generator has been heretofore made of a series of hollow cast-iron rings arranged around the fire and communieating so as to form a coil in effect; but the construction and arrangement of parts was much different frornthat shown by me.

What I claim is as follows:

1. A steam-generating boiler.consisting of the horseshoe-shaped hollow castings O' O, forming the upper and lower ends of said boiler, the hollow rings P P, and the two series of hollow rings Q Q, respectively arranged, as shown, between the said castings O O, the whole being constructed and arranged substantially as and for the purposes set forth.

2. In a steam-generating boiler which is composed of a coil formed of hollow cast-iron rings, the upper and lower ends of said boiler, formed of horseshoe-shaped castings, substantially as and for the purposes mentioned.

3. In a steamgenerator boiler which is composed of a coil formed of hollow cast-iron rings, the middle portion of said coil, formed of two series of rings, the rings of each series opening into each other and both series communicating at the top and bottom with large rings, as shown.

4. In a steam-generating boiler which is composed of a coil formed in part of two series of rings, the combination therewith of a partition placed between the said series of rings, as shown, whereby the heat from the fire will be caused to impinge first upon one series and then upon the other, as set forth.

5. The combination, with a steam-generating coil, of the partition M, jackets E and E, and openings d, d, and 01, substantially as and for the purposes mentioned.

In testimony whereof I have hereunto set my hand.

MELVIN N. LOVELL.

Witnesses:

JNo. K. HALLOGK, E. J. OowELL. 

